Patent US4517095A successfully refreshed from Google Patents.
US4517095A
Expired / Lapsed
US
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Fluoride containing compositions for removal of pollutants from waste waters and methods of utilizing same
Assignee: Individual
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Filing: 1983-12-08
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Granted: 1985-05-14
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Expires: 2003-12-08
Abstract
Abstract Novel compositions containing fluoride are provided for the removal of organic and heavy metal pollutants from waste waters and methods of utilizing same. The compositions comprise components selected from ion exchange absorbent gels, cements, water soluble fluoride containing salts and optionally alkali metal ortho phosphates. The procedures of the present invention yield not only clarified waters but provided a sludge which can be disposed of under environmentally acceptable conditions.
Inventors
- 👤 Anthony V. Ceaser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:22
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
171 words
A method for the removal of pollutants from waste water which comprises contacting the waste waters to be treated with a composition comprising at least members of groups (b) and (c) of the following groups (a), (b), (c) and (d): (a) ion exchange absorbent gels, consisting of at least one member selected from the group consisting of calcined clays, amorphous silicas, aluminas, natural and artificial zeolites, perlites or vermiculite, (b) cementitious materials selected from the group consisting of Portland cements, aluminous cements, puzzalan cements, gypsum plasters, alkaline earth metal oxides and alkaline earth metals hydrated oxides, (c) water soluble fluoride containing salts, and (d) alkali metal ortho phosphates, provided that where no alkali metal ortho phosphate is present an additional component is selected from the group (a) or group (b), further provided that where no alkali metal ortho phosphate or group (a) components are present, three components are selected from group (b), at a pH above pH 6.0 and allowing the sludge formed thereby to cure for at least 24 hours.
Claim 2
Independent Claim
171 words
A method for the removal of pollutants from waste water which comprises contacting the waste waters to be treated with a composition comprising at least members of groups (b) and (c) of the following groups (a), (b), (c) and (d): (a) ion exchange absorbent gels, consisting of at least one member selected from the group consisting of calcined clays, amorphous silicas, aluminas, natural and artificial zeolites, perlites or vermiculite, (b) cementitious materials selected from the group consisting of Portland cements, aluminous cements, puzzalan cements, gypsum plasters, alkaline earth metal oxides and alkaline earth metals hydrated oxides, (c) water soluble fluoride containing salts, and (d) alkali metal ortho phosphates, provided that where no alkali metal ortho phosphate is present an additional component is selected from the group (a) or group (b), further provided that where no alkali metal ortho phosphate or group (a) components are present, three components are selected from group (b), at a pH above pH 6.0 and allowing the sludge formed thereby to cure for at least 24 hours.
Claim 3
Dependent Claim
110 words
A method according to claim 1 wherein the absorbent gels of group (a) comprise between 15 and 55 parts by weight of the total composition, the cementitious materials of group (b) comprise between 30 and 80% by weight of the total composition, the fluoride containing salts comprise between 0.2 and 10% by weight of the total composition and the alkali metal ortho phosphate comprises between 0 and 20% by weight of the total composition provided that where no phosphate is present the fourth component is selected from group (a) or group (b) and comprises substantially the same proportion of the total composition as the initial component selected from group (a).
Claim 4
Dependent Claim
20 words
A method according to claim 2 wherein the sludge is separated from the clarified water and then allowed to cure.
Claim 5
Dependent Claim
20 words
A method according to claim 2 wherein the sludge is allowed to pure prior to separation from the clarified water.
Claim 6
Dependent Claim
26 words
A method according to claim 2 wherein the ratio of treatment composition to pollutant is in the range of 5 to 1 through 25 to 1.
Claim 7
Dependent Claim
20 words
A method according to claim 1 wherein the sludge is separated from the clarified water and then allowed to cure.
Claim 8
Dependent Claim
20 words
A method according to claim 1 wherein the sludge is allowed to cure prior to separation from the clarified water.
Claim 9
Dependent Claim
26 words
A method according to claim 1 wherein the ratio of treatment composition to pollutant is in the range of 5 to 1 through 25 to 1.
Claim 10
Independent Claim
166 words
A method of removing the pollution from waste water and providing a solidification cement, said cement being substantially unleachable with respect to said pollutant which comprises contacting the waste waters to be treated with a composition comprising at least members of groups (b) and (c) of the following groups (a), (b), (c) and (d): (a) ion exchange absorbent gels, consisting of at least one member selected from the group consisting of calcined clays; amorphous silicas, aluminas, natural and artificial ziolites, perlites or vermiculite, (b) cementitious materials selected from the group consisting of Portland cements, aluminous cements, puzzalan cements, gypsum plasters, alkaline earth metal oxides and alkaline earth metals hydrated oxides, (c) water soluble fluoride containing salts, and (d) alkali metal ortho phosphates, provided that where no alkali metal ortho phosphate is present an additional component is selected from the group (a) or group (b), further comprising that where no alkali metal ortho phosphate or group (a) components are present, three components are selected from group (b).
Claim 11
Independent Claim
166 words
A method of removing the pollution from waste water and providing a solidification cement, said cement being substantially unleachable with respect to said pollutant which comprises contacting the waste waters to be treated with a composition comprising at least members of groups (b) and (c) of the following groups (a), (b), (c) and (d): (a) ion exchange absorbent gels, consisting of at least one member selected from the group consisting of calcined clays; amorphous silicas, aluminas, natural and artificial ziolites, perlites or vermiculite, (b) cementitious materials selected from the group consisting of Portland cements, aluminous cements, puzzalan cements, gypsum plasters, alkaline earth metal oxides and alkaline earth metals hydrated oxides, (c) water soluble fluoride containing salts, and (d) alkali metal ortho phosphates, provided that where no alkali metal ortho phosphate is present an additional component is selected from the group (a) or group (b), further comprising that where no alkali metal ortho phosphate or group (a) components are present, three components are selected from group (b).
Claim 12
Dependent Claim
81 words
A method of claim 7 of removing pollution from waste water and providing a solidification cement, said cement being substantially unleachable with respect to said pollutant which comprises contacting the waste waters to be treated with a composition comprising no group (a) components, three materials of group (b) comprising between 90 and 99.7% by weight of the total composition, the fluoride containing salts comprise between 0.3 and 10% by weight of the total composition and comprising no alkali metal ortho phosphate.
Claim 13
Dependent Claim
23 words
A method of claim 10 wherein the composition comprises substantially 75% gypsum 19% 50:50 mixture calcified clay and lime; and 0.4% ammonium bifluoride.
Claim 14
Dependent Claim
23 words
A method of claim 10 wherein the composition comprises substantially 37% Portland cement; 28% bentonite clay; 28% diatomaceous silica; and 7% zinc fluorosilicate.
References Cited (Backward Citations)
US4404105A
Cited
US4149968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |